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Ask HN: What are you working on? (August 2026)

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Re: Ask HN: What are you working on? (August 2026)

#631
post #46

Succinct data structures. Finished the indexable bit vector, with nanosecond rank/select operations. Working on the range min max tree based balanced parentheses succinct tree structure, with support for the usual tree navigation and operations.

what a cool answer

Re: Ask HN: What are you working on? (August 2026)

#632

I've been building the most advanced automotive diagnostic app on the market I used to be a mechanic, and spend a lot of my free time working on project vehicles, motorcycles, tractors, trucks etc. I wanted a tool to track the tasks I needed done, then a way to easily access VIN info for parts search, then I DMV records, and finally built an iphone app to scan the OBD2 diagnostic codes and hook them up to a custom ai…

Very cool indeed. Make it really easy also for non mech people to diagnose and get an idea on a problem while having only an OBD2 adapter. How are the reparations prices calculated? Is there some kind of dataset you builder or is it just a guide prompt to an LLM?

Re: Ask HN: What are you working on? (August 2026)

#634
For the past four months, I've been building a window manager for MacOS based on my 2009 concept video 10/GUI.

I've overcome about a dozen "there's simply no way to do this in MacOS and I have to abandon the project" challenges so far. MacOS really does not want to let you manage windows in this novel of a way, and I've had to come up with a handful of tricks to maintain the illusion that the WM is accessing the compositor at a lower level than it actually is. But it works, and I'm dogfooding it as I go!

I'm hopefully only a few weeks away now from a full announcement and a beta. If you're curious to try the first beta, feel free to get in touch at clayton at presteign dot com.

Re: Ask HN: What are you working on? (August 2026)

#636
As a side project, I've been working on a RAG/MCP/agent service with workflows, for security: https://mappedsky.com/seizu/

This primarily builds on top of cartography (https://docs.cartography.dev/), which I'm a contributor to, which pulls infrastructure, SaaS, etc info into a Neo4j database, makes edges, and has a standardize ontology, so you can do attack path analysis, vulnerability assessment, inventory, etc.

Seizu uses the RAG built by cartography, and adds reporting, graph exploration, automations and more on-top of it. It currently ships with a couple pre-made automations:

* Automatic dependency vulnerability fixes, like dependabot, but uses codex/claude/opencode in a sandbox to do so, which ensures it doesn't just bump a version in the file, but actually assesses whether the changes in dependencies need code updates, and gives you a thorough overview on if changes aren't needed, and why changes were needed if so. If tests break, it also watches and fixes them automatically. * A workflow to run the cartography sync, making it possible to split apart the stages, run portions of the sync on different schedules, in parallel, etc, while also making it possible to properly trigger downstream syncs, or other types of workflows. * Generic AI agent workflow, which can be staged, run in parallel, or chained together via inputs/outputs, using Seizu's own custom agent (which has good LLM provider support, sandbox support with files, etc)

Workflows are built on-top of temporal, allowing it to be quite flexible.

Re: Ask HN: What are you working on? (August 2026)

#638
I'll be flying to Edinburgh for the Fringe Festival in a couple of days, and I've been putting together a much better app than the official one. It builds the full catalog of shows as a sqlite database and syncs it to your phone so that you can filter, search, sort, and build a schedule even with the traditionally spotty data during the fest. I also added a bunch of coordination features for planning your Fringe with friends.

It's a PWA, not a native app over at https://fringeflypost.com/ (or you can go directly to https://fringeflypost.com/shows to browse if you don't want to make an account.)

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